PHP8 cubrid_is_instance

2024-03-28 09:31 更新

(PECL CUBRID >= 8.3.0)

cubrid_is_instance — 检查OID指向的实例是否存在

说明

cubrid_is_instance(resource $conn_identifier, string $oid): int

cubrid_is_instance() 函数用于检查 给定的实例是否存在。oid

参数 

conn_identifier

连接标识符。

oid

要检查是否存在的实例的 OID。

返回值 

1、如果存在此类实例;

0,如果此类实例不存在;

-1,出错时

示例 

示例 #1 cubrid_is_instance() example

<?php
$conn = cubrid_connect("localhost", 33000, "demodb");

$sql = <<<EOD
SELECT host_year, medal, game_date 
FROM game 
WHERE athlete_code IN 
    (SELECT code FROM athlete WHERE name='Thorpe Ian');
EOD;

$req = cubrid_execute($conn, $sql, CUBRID_INCLUDE_OID);
$oid = cubrid_current_oid($req);

$res = cubrid_is_instance ($conn, $oid);
if ($res == 1) {
    echo "Instance pointed by $oid exists.\n";
} else if ($res == 0){
    echo "Instance pointed by $oid doesn't exist.\n";
} else {
    echo "error\n";
}

cubrid_disconnect($conn);
?>

以上示例会输出:

Instance pointed by @0|0|0 doesn't exist.

参见 

  • cubrid_drop() - 使用 OID 删除实例
  • cubrid_get_class_name() - 使用 OID 获取类名


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